U.S. President Obama honors the 1972 season Miami Dolphins, the NFL Superbowl-winning football team in the East Room of the White House in Washington

JASON REED / Reuters

U.S. President Barack Obama honors the 1972 season Miami Dolphins, the NFL Superbowl-winning football team in the East Room of the White House in Washington, August 20, 2013. The team were undefeated in their season, still the only team to do so. Pictured holding the jersey are former quarterback Bob Griese (L) and former coach Don Shula.

U.S. President Barack Obama honors the 1972 season Miami Dolphins, the NFL Superbowl-winning football team in the East Room of the White House in Washington, August 20, 2013. The team were undefeated in their season, still the only team to do so. Pictured holding the jersey are former quarterback Bob Griese (L) and former coach Don Shula. (JASON REED / Reuters)

U.S. President Barack Obama honors the 1972 season Miami Dolphins, the NFL Superbowl-winning football team in the East Room of the White House in Washington, August 20, 2013. The team were undefeated in their season, still the only team to do so. Pictured holding the jersey are former quarterback Bob Griese (L) and former coach Don Shula.